Use inverse time overcurrent for overload protection and an instantaneous overcurrent for short circuit protection. Set the curve to match the motor overload curve. Usually set pickup at 115%-125% of Full Load Amps (FLA) with the time dial adjusted to trip on Locked Rotor Current faster than the allowable hot stall time and slower than the motor/load's acceleration time.
Set instantaneous above the motor inrush current.
You will need the motor thermal limit curves to properly set the relay.
